3.9 Trigonometric functions
real hypot(real x, real y)
Return the length of the hypotenuse of a right triangle with sides of
length x and y. \[ \text{hypot}(x,y) = \begin{cases} \sqrt{x^2+y^2} &
\text{if } x,y\geq 0 \\ \textrm{NaN} & \text{otherwise} \end{cases} \]
R hypot(T1 x, T2 y)
Vectorized implementation of the hypot function
R cos(T x)
cosine of the angle x (in radians)
R sin(T x)
sine of the angle x (in radians)
R tan(T x)
tangent of the angle x (in radians)
R acos(T x)
principal arc (inverse) cosine (in radians) of x
R asin(T x)
principal arc (inverse) sine (in radians) of x
R atan(T x)
principal arc (inverse) tangent (in radians) of x, with values from
\(-\pi\) to \(\pi\)
real atan2(real y, real x)
Return the principal arc (inverse) tangent (in radians) of y divided
by x, \[ \text{atan2}(y, x) = \arctan\left(\frac{y}{x}\right) \]